What are the differences between a cat back exaust on an 85 pickup compared to a 87 pickup?

 

nothing I can think of

most toyota stealerships will do a cat back for $150 installed and will be far better than most muff shops unless your doing it yourself.

 

they would be essentially identical. about the only difference I can think of might be to do with the position of the O2 sensor(s). Some years had a second o2 sensor mounted after the cat but thats all the difference there would be between the two. aviator